https://occovid19.ochealthinfo.com/coronavirus-in-oc I'm trying to communicate using a continuing dialog between two processes on the same system. I've looked at various mechanisms and the class that seems to fit my needs is Popen in the subprocess module, but I can't seem to get more than a single round-trip message through Popen. I first call Popen then poll using the identifier returned from the call and the poll seems to work. I then call the communicate function passing None as the value to send to the companion process stdin. I get the expected result, but I also get "Exception condition detected on fd 0 \\n" and "error detected on stdin\\n". Subsequent attempts to read/write/communicate with the subprocess fail because the file (stdxx PIPE) is closed.
I can't tell from the documentation if the communicate function is a one-time operation. I have tried using read but the read call doesn't return (I'm using winpdb-reborn to monitor the operations). I'm using Python 3.7, Windows 10, winpdb-reborn 2.0.0, rpdb2 1.5.0. If it makes any difference, I'm trying to communicate with GDB using the MI interpreter. Thoughts and advice appreciated! Dick -- https://mail.python.org/mailman/listinfo/python-list